| Autor: |
B S, Schlimme, P, Achenbach, C A, Ayerbe Gayoso, J C, Bernauer, R, Böhm, D, Bosnar, Th, Challand, M O, Distler, L, Doria, F, Fellenberger, H, Fonvieille, M, Gómez Rodríguez, P, Grabmayr, T, Hehl, W, Heil, D, Kiselev, J, Krimmer, M, Makek, H, Merkel, D G, Middleton, U, Müller, L, Nungesser, B A, Ott, J, Pochodzalla, M, Potokar, S, Sánchez Majos, M M, Sargsian, I, Sick, S, Sirca, M, Weinriefer, M, Wendel, C J, Yoon |
| Rok vydání: |
2013 |
| Zdroj: |
Physical review letters. 111(13) |
| ISSN: |
1079-7114 |
| Popis: |
A measurement of beam helicity asymmetries in the reaction 3He[over →](e[over →],e'n)pp is performed at the Mainz Microtron in quasielastic kinematics to determine the electric to magnetic form factor ratio of the neutron GEn/GMn at a four-momentum transfer Q2=1.58 GeV2. Longitudinally polarized electrons are scattered on a highly polarized 3He gas target. The scattered electrons are detected with a high-resolution magnetic spectrometer, and the ejected neutrons are detected with a dedicated neutron detector composed of scintillator bars. To reduce systematic errors, data are taken for four different target polarization orientations allowing the determination of GEn/GMn from a double ratio. We find μnGEn/GMn=0.250±0.058(stat)±0.017(syst). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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